diff --git a/math/scale2d.glsl b/math/scale2d.glsl
new file mode 100644
index 00000000..aecaf4c7
--- /dev/null
+++ b/math/scale2d.glsl
@@ -0,0 +1,14 @@
+/*
+original_author: Patricio Gonzalez Vivo
+description: returns a 2x2 scale matrix
+use: scale2d(<float> radians)
+*/
+
+#ifndef FNC_SCALE4D
+mat2 scale2d(float _scale) {
+    return mat2(
+        _scale, 0.0,
+        0.0, _scale,
+    );
+}
+#endif
\ No newline at end of file
diff --git a/math/scale3d.glsl b/math/scale3d.glsl
new file mode 100644
index 00000000..daa94b4d
--- /dev/null
+++ b/math/scale3d.glsl
@@ -0,0 +1,15 @@
+/*
+original_author: Patricio Gonzalez Vivo
+description: returns a 3x3 scale matrix
+use: scale3d(<float> radians)
+*/
+
+#ifndef FNC_SCALE4D
+mat3 scale3d(float _scale) {
+    return mat3(
+        _scale, 0.0, 0.0,
+        0.0, _scale, 0.0,
+        0.0, 0.0, _scale,
+    );
+}
+#endif
\ No newline at end of file
diff --git a/sdf.glsl b/sdf.glsl
index db21193b..60346a1a 100644
--- a/sdf.glsl
+++ b/sdf.glsl
@@ -36,7 +36,7 @@
 
 // Operations
 #include "sdf/opOnion.glsl"
-#include "sdf/opRepite.glsl"
+#include "sdf/opRepeat.glsl"
 #include "sdf/opRevolve.glsl"
 #include "sdf/opRound.glsl"
 #include "sdf/opSubtraction.glsl"
diff --git a/sdf.hlsl b/sdf.hlsl
index 10b1d394..53729671 100644
--- a/sdf.hlsl
+++ b/sdf.hlsl
@@ -34,7 +34,7 @@
 
 // Operations
 #include "sdf/opOnion.hlsl"
-#include "sdf/opRepite.hlsl"
+#include "sdf/opRepeat.hlsl"
 #include "sdf/opRevolve.hlsl"
 #include "sdf/opRound.hlsl"
 #include "sdf/opSubtraction.hlsl"
diff --git a/sdf/opRepeat.glsl b/sdf/opRepeat.glsl
new file mode 100644
index 00000000..803429a8
--- /dev/null
+++ b/sdf/opRepeat.glsl
@@ -0,0 +1,27 @@
+/*
+original_author:  Inigo Quiles
+description: repeat operation for 2D/3D SDFs 
+use: <vec4> opElongate( in <vec3> p, in <vec3> h )
+*/
+
+#ifndef FNC_OPREPEAT
+#define FNC_OPREPEAT
+
+vec2 opRepeat( in vec2 p, in float s ) {
+    return mod(p+s*0.5,s)-s*0.5;
+}
+
+vec3 opRepeat( in vec3 p, in vec3 c ) {
+    return mod(p+0.5*c,c)-0.5*c;
+}
+
+vec2 opRepeat( in vec2 p, in vec2 lima, in vec2 limb, in float s ) {
+    return p-s*clamp(floor(p/s),lima,limb);
+}
+
+vec3 opRepeat( in vec3 p, in vec3 lima, in vec3 limb, in float s ) {
+    return p-s*clamp(floor(p/s),lima,limb);
+}
+
+#endif
+
diff --git a/sdf/opRepite.hlsl b/sdf/opRepeat.hlsl
similarity index 58%
rename from sdf/opRepite.hlsl
rename to sdf/opRepeat.hlsl
index 7ee37459..8c22c7e6 100644
--- a/sdf/opRepite.hlsl
+++ b/sdf/opRepeat.hlsl
@@ -6,22 +6,22 @@ description: repite operation of one 2D SDFs
 use: <vec4> opElongate( in <float3> p, in <float3> h )
 */
 
-#ifndef FNC_OPREPITE
-#define FNC_OPREPITE
+#ifndef FNC_OPREPEAT
+#define FNC_OPREPEAT
 
-float2 opRepite( in float2 p, in float s ) {
+float2 opRepeat( in float2 p, in float s ) {
     return mod(p+s*0.5,s)-s*0.5;
 }
 
-float3 opRepite( in float3 p, in float3 c ) {
+float3 opRepeat( in float3 p, in float3 c ) {
     return mod(p+0.5*c,c)-0.5*c;
 }
 
-float2 opRepite( in float2 p, in float2 lima, in float2 limb, in float s ) {
+float2 opRepeat( in float2 p, in float2 lima, in float2 limb, in float s ) {
     return p-s*clamp(floor(p/s), lima, limb);
 }
 
-float3 opRepite( in float3 p, in float3 lima, in float3 limb, in float s ) {
+float3 opRepeat( in float3 p, in float3 lima, in float3 limb, in float s ) {
     return p-s*clamp(floor(p/s), lima, limb);
 }
 
diff --git a/sdf/opRepite.glsl b/sdf/opRepite.glsl
deleted file mode 100644
index 4b3e04b5..00000000
--- a/sdf/opRepite.glsl
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-original_author:  Inigo Quiles
-description: repite operation of one 2D SDFs 
-use: <vec4> opElongate( in <vec3> p, in <vec3> h )
-*/
-
-#ifndef FNC_OPREPITE
-#define FNC_OPREPITE
-
-vec2 opRepite( in vec2 p, in float s ) {
-    return mod(p+s*0.5,s)-s*0.5;
-}
-
-vec3 opRepite( in vec3 p, in vec3 c ) {
-    return mod(p+0.5*c,c)-0.5*c;
-}
-
-vec2 opRepite( in vec2 p, in vec2 lima, in vec2 limb, in float s ) {
-    return p-s*clamp(floor(p/s),lima,limb);
-}
-
-vec3 opRepite( in vec3 p, in vec3 lima, in vec3 limb, in float s ) {
-    return p-s*clamp(floor(p/s),lima,limb);
-}
-
-#endif
-